| Motor Type |
Advantages |
Disadvantages |
DSP Benefits |
| Universal/ DC-Brush |
Low Cost
Easy to Control |
Unreliabel (maintenance cost)
Poor performance (low efficiency, heavier) |
Accurate positioning and velocity
Less power dissipation
Multi-axis control
Advanced adaptive algorithms |
AC Induction
(ACI) |
Easy to mfg.
Efficient
Reliable
Low cost |
Difficult to control
Thermal management (heat)
Larger size |
FOC & space vector modulation
Fast A/D - high dynamic response
Phase current and rotor resistance estimation |
Brush Less DC
(BLDC) |
Very efficient
Highest torque/amp
Smaller, lighter |
Higher cost
Difficult to mfg. (magnets glued on)
Susceptibility to de-magnetization in field weakening regions |
Reduce sensors and memory
Advanced control algorithms
Real-time rotor position sensing
Speed calculation and adaptive torque command
Precision current control |
Switched Recluctance
(SR) |
Safe (no sparks)
Easy to mfg.
Low mfg. cost
Very high speed operation |
Very difficult to control
High torque ripple (discontinuity due to discrete steps)
Possibility of reverse start-up rotation |
Closed loop current control
Torque ripple compensation
Active noise cancellation |
